Java AbstractSequentialList clear()用法及代码示例

Java中的AbstractSequentialList的clear()方法用于从列表中删除所有元素。该调用返回后，该列表将为空。

用法:

public void clear()

参数：此函数没有参数。

返回：该方法不返回任何值。它将删除列表中的所有元素并将其清空。

以下示例说明了AbstractSequentialList.clear()方法：

范例1：

// Java code to demonstrate the working of 
// clear() method in AbstractSequentialList 
  
import java.util.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
        // creating an AbstractSequentialList 
        AbstractSequentialList<Integer> arr 
            = new LinkedList<Integer>(); 
  
        // using add() to initialize values 
        // [1, 2, 3, 4] 
        arr.add(1); 
        arr.add(2); 
        arr.add(3); 
        arr.add(4); 
  
        // list initially 
        System.out.println("The list initially:"
                           + arr); 
  
        // clear function used 
        arr.clear(); 
  
        // list after clearing all elements 
        System.out.println("The list after "
                           + "using clear() method:"
                           + arr); 
    } 
}

输出：

The list initially:[1, 2, 3, 4]
The list after using clear() method:[]

范例2：

// Java code to demonstrate the working of 
// clear() method in AbstractSequentialList 
  
import java.util.*; 
  
public class GFG { 
    public static void main(String[] args) 
    { 
        // creating an AbstractSequentialList 
        AbstractSequentialList<String> arr 
            = new LinkedList<String>(); 
  
        // using add() to initialize values 
        // [Geeks, For, ForGeeks, GeeksForGeeks] 
        arr.add("Geeks"); 
        arr.add("For"); 
        arr.add("ForGeeks"); 
        arr.add("GeeksForGeeks"); 
  
        // list initially 
        System.out.println("The list initially:"
                           + arr); 
  
        // clear function used 
        arr.clear(); 
  
        // list after clearing all elements 
        System.out.println("The list after "
                           + "using clear() method:"
                           + arr); 
    } 
}

输出：

The list initially:[Geeks, For, ForGeeks, GeeksForGeeks]
The list after using clear() method:[]

相关用法

注：本文由纯净天空筛选整理自Code_r大神的英文原创作品 AbstractSequentialList clear() method in Java with Example。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。